Door closure



July 4, 1933. o. c. JOHNSON 1,917,127

I DOOR CLOSURE Filed Aug. 12, 1951 z'sheets-sheet 1 July 4, 1933.

o. c. JOHNSON DOOR CLOSURE Filed Aug. 12, 1931 2 sheets-sheet 2 PatentedI 2o 7 throu houtthe seiverallfig'uresot thewdraw .2in-ciosed'pcsitilon, w a sectlonalyiew on flierglin e of Fig.1," 1 V 3is averticalsection of thedoorshoiw V ing -in dotted lines its' many;open position; eel a d Y This invention relates to closure; operatorsand m iore' particularly to that typeiny'olm inga'door made. in sectionswhich are-hinged v 7 together and which is 'velevat ed the open ance isused whichcounterbalancemay employed as :anoperating ineansffor'thezdoor:

, l he object of-the invention'is tofsimpliatyyf the construction ofsuch .doori-so that; it will demand but a minimum of space in its open?I p v p p i (the;:lower section or door ing and closing so, that; thecounterbalance Will not have to travel, to the floor of-the ga rage lin'thev-perfonnance iof thi-s ffunction.

pended claims.

.1 p ings, in WhlCll Fig: '1 an elevation-of is: seen fr.om,tl1ie insideof garag.

Fig. 4 is a detail (if theslide bar."

The door is co nprised'of sections'lO and- 11,'the"lowerdoor 10 beingslightly greater, in height than the upper section'll; [These 1 7;two'parts of the door are joined together by v,

, hinges 12 and the door as a Wholeis'hin'ged v at 13'to the overheadbeam 14 in such a Way 1 7 that the-upper section when the door is" openWill'occupy a position in front, of'the garage,

a; as shown in Fig. 3 indotted lines;

Q it willflbe appreciated "thattheoutstan'ding 7 web of-this angle guideindicated by the nu 4:; meral 19 occupies alpo'sition behindthe' door jAs shown in Fig. 2, thisweb when the door is in closed'position makes asubstantially tight joint with the abutting door sections.

-' On the lower sectionjof the door there is 5 p mounted a pair.of-slide bars 20andj21which {1P P TENT TF-F EQE .1 m go 1 grip I is a:primari' door andis connected to the *sllde bars 1 Other objectsand'advanstagesof theirinyen 3 tion will hereinafter :a'ppear:inithefollowing description and thenovei efieaturesfthereotf will beparticularly pointed out inath'e tap -55 5- vf-ofu wlii'ch:isrnounted1apair' .7 Like reference ;numeralsiindicate likeiparts height of, the'lower door seGtiOnQ Tlieu -I I per'end .ofthe slide'f floaris attachd'to Ithe 5 i'lowersdocrsectionjatzsubstantially itsjinedial' line; @nthejsarne eoor section is mounted ,handagrips came 23, the'ha nd grip;22 b'eing employed {to thesectio of-cablesE25 an might er suitable pu lleys :whichwi clescrrbedErin detaiI.

Pull supports 27 and'lin all l I resp eats; in their detail constructionare suit"- a-bi secured-to the overhead bea 14 each 7 respectively"horizontal? an desagnedlinthe Well-known manner-to change ithe;direction;oztavtraveluiof 'thfei cablesL-"Q'Ihe a j cablestlnzn'selives travelingpulleys-29 I andiiifiOtrat:theirloyver ends,;whichtrave l ing V pulleysare clesignedto move'alongthe length -of-xth'e--slideiba-rs inath'e iupwardggmoyemcnt I otfstherdoorarThepositionyofethese pulleys; ,When the door is closed, isgshowniii'fitll1' i is open, is shownin'dottedlinesin F igql3. a

Both cables pass over the pulley 31' and] supports shown maybe-said-tobe right hand i r pulleyunits, then lefthand pulleyunits of v l I Alongthe jambs' 15 and '16fof the building are mounted angle'guidesl'Z and 18and:

identical construction -Wlll produce this change ofsdirection 'It'Wlllalso'bje appre-.- 3 ciated'that the counterbalance may be located aatthe rear of the garage and centrally there- I .i of, in whichcase oneright hand pulley sup-3' j por and' one jlefthand-pulley support may ihave fa ..Jehgth Qsubstantially the air; as Q jforbu ckli g I V V r, issrticaL pivots,"

parent. A rsum only, therefore, is necessary to a full disclosure of theinvention.

Reference is had to Fig. 3 of the drawings and to the full linedisclosure found there. The lifting cable is shown as exerting a pullupon the lower section of the door at the point indicated by the numeral32, and when the door sections are buckled by a push on the hand grip23, the counterbalance pull at the point 32 will be suflicient to enableone to lift the doors through a gripping of the hand grip 22. In thislifting operation the flange or web 19 of the angles 17 and 18 willprevent the lower section of the door fromentering the garage, but thelower end of the door section 10 will ride upon this flange or web inthe ascent of the door to the dotted line position shown in Fig. 3.

During the doors ascent the traveling pulley will move from its positionat the upper end of the slide bar as shown in full lines in Fig. 3, to aposition at the lower end of the slide bar shown in dotted lines in Fig.3. Two results are accomplished by the provision of the slide barand-traveling pulleys. The first is to permit the counterbalance 24 tohave .suflicient travel from its elevated position, shown in Fig. 1, tothe floor of the garage to accomplish the movement of the sectional doorto its open position; it will be appreciated that if the cable wereattached to the lower section of the door at a lower position than thatindicated by the numeral 32, the counterbalance would reach the floorbefore the complete. opening of the door had been accomplished.Secondly, the transferring of V the pullupon the lower section of thedoor from the point 32 to the point 33 (see Fig. 3) reduces the inwardpull upon the door tending to bind the lower end of the section 10 uponthe flange 19 and therefore permits the more easy operation of the doorin both ascent and descent.

It will be appreciated that the parts form ing the door and operatorherein described are all standard parts and that they may be shipped asa unit to be inserted in the opening of a garage of a given size. Inother age necessary when the cables are working from the upper part ofthe slides as the door in starting requires less counter-balancing. Inthe ascent of the door, when the pulleys roll to the lower portion ofthe slides, additional leverage, is secured and permits the door to goto the top with very little exertion on the part of the operative. Itwill also be noted that the operator is one which does not require aspring, making the operation more positive and avoiding the necessity ofadjustments inherent in a spring operated door. 7

Having described. my invention what I claim is: 1

In amanua-lly operated door, a door proper composed of upper and lowersections hingedly connected, said sections being of substantially thesame height and adapted to lie outside the frame in their flexed andopen position, and means for counterbalancing the weight of said doorcomprising a cable and weight, said cable being connected to the lowersection of said door by a sliding connection, whereby the initial pullupon the door will be at substantially the central portion of said lowersection and the final pull upon the door will be at substantially thelower portion of said lower section.

In testimony whereof, I atlix my signature.

ORVILLE G. JOHNSON.

